EP0865830B2 - Colour changer with reversible direction of paint flow - Google Patents

Colour changer with reversible direction of paint flow Download PDF

Info

Publication number
EP0865830B2
EP0865830B2 EP98104412A EP98104412A EP0865830B2 EP 0865830 B2 EP0865830 B2 EP 0865830B2 EP 98104412 A EP98104412 A EP 98104412A EP 98104412 A EP98104412 A EP 98104412A EP 0865830 B2 EP0865830 B2 EP 0865830B2
Authority
EP
European Patent Office
Prior art keywords
paint
coloured
feed line
displacement body
color
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98104412A
Other languages
German (de)
French (fr)
Other versions
EP0865830A3 (en
EP0865830B1 (en
EP0865830A2 (en
Inventor
Stefan Esslinger
Herbert Martin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Duerr Systems AG
Original Assignee
Duerr Systems AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7822967&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0865830(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Duerr Systems AG filed Critical Duerr Systems AG
Publication of EP0865830A2 publication Critical patent/EP0865830A2/en
Publication of EP0865830A3 publication Critical patent/EP0865830A3/en
Application granted granted Critical
Publication of EP0865830B1 publication Critical patent/EP0865830B1/en
Publication of EP0865830B2 publication Critical patent/EP0865830B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • B05B12/149—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet characterised by colour change manifolds or valves therefor

Definitions

  • the invention relates to a device for painting objects with different colors, which are available in circular color guides, which are each associated with a color, with a spray gun, a Farbzumoltechnisch which a Lackierstoff für between the circular color guide and the spray gun or whose nozzle produces, and optionally a provided between the circular color ducts and the Farbzumoltechnisch color changer, through which in each case a color line with the Farbzumoltechnisch is connectable, wherein a displacement body for cleaning the Farbzumoltechnischtechnisch the Farbzumoltechnischtechnisch the Farbzumoltechnisch is movable.
  • a painting device with the features of the preamble of claim 1 is known from U.S. Patent 5,221,047 known.
  • the displacer is moved for expressing the color in the paint supply in Lackierfluß therapies to their spritzpistolen drunkem end, there removed by means of a reject device from the ink supply and returned via a separate line to a Einschleuß issued. To bridge this time, a plurality of displacers are provided. A return of befind Anlagen in the ink supply line color back into the color line is not provided. But that is taken for granted, from the JP 07 171 451 A known.
  • the present invention is based on the previously known painting the task of making the color return of the stich eins shamen ink supply line with displacers back to a respective circular color guide even more effective.
  • the color return by introducing a flowable medium, which may be preferably a gas, such as compressed air, or even to be a liquid solvent to support.
  • the liquid medium acts like a stamping pressure on the standing in the feed line color and ensures a thirty to fifty percent more effective return of color.
  • the feed device for the flowable medium forms a T-connection with the ink feed, this in turn results in an undesirable stub line. It is therefore proposed that the feed device comprises a valve which connects on its color side dead space free to the ink supply.
  • the flexible, flexible deformable displacer is provided, which is movable by the incoming medium via the feed medium in the ink supply line in the return direction and back in the direction of the spray gun during subsequent rinsing the ink supply.
  • the recovery rate can be increased to 95% or more, since the conductor inner wall is virtually wiped off by the movement of the yielding displacement body in the return direction.
  • the diameter of the displacer in the undeformed state substantially corresponds to the line internal diameter or is slightly larger than this.
  • the displacer is in a rest position, preferably in a mold cavity in the ink feed line in the region of the dead space-free valve port of the supply line.
  • the valve of the feed device for the flowable medium is opened, the displacer from the mold cavity is pressed under the action of the pressurized fluid medium in the clear cross-sectional area of the ink supply and moved in the return direction.
  • a stop device for the displacer is provided in the ink return direction in front of the ink return device, which forms a kind stop or limit for the displacer.
  • the stop device is formed in a particularly simple and therefore advantageous manner preferably by a cross-sectional constriction in the Farbzumoltechnisch.
  • a sensor for detecting the displacer is provided in the region of the stop device, in particular in the return direction in front of the stop device. This sensor interacts with a control of the paint shop. When the sensor detects that the displacer has reached its end position in the region of the stop device, the return operation is completed and a flushing operation of the ink supply line can be initiated.
  • the detection of the displacer is preferably carried out without contact, which can be achieved by an inductively or capacitively operating sensor.
  • the displacement body comprises an inductively detectable signal body, such as e.g. a metallic, in particular spherical core.
  • FIG. 1 shows a schematic representation of a device for painting objects with different colors.
  • the colors are introduced via circularly guided color lines 2, which emanate from a merely indicated ink supply space 4 and return to this, brought to the painting.
  • the painting device comprises a color changer 6, which is selectively connectable to each of the color lines 2.
  • a Farbzumoltechnisch 8 is provided which produces a Lackierstoff für between the color changer 6 and a spray gun 10 and a nozzle 12 of the spray gun 10.
  • various compressed air supply lines are provided, wherein a compressed air line 14 opens into the color changer 6 and another compressed air line 16 leads to the spray gun 10 and the so-called spray air for atomizing or dusting the paint in the spray operation of the spray gun 10 supplies.
  • a compressed air line 18 extends as part of a feed device 20 for a flowable medium under pressure (compressed air) to the ink supply line 8 and flows through a valve 21 in the ink feed 8.
  • one of the shut-off valves between a respective color line 2 and the color changer 6 is opened, so that the pressure prevailing in the circular color guide line propagates through the color changer 6 in the feed line 8. Since this pressure is sufficient for operating the spray gun, no further pump needs to be used and a provided in the ink supply line gear pump 22 is bypassed via a bypass line 24.
  • the gear pump 22 in Lackier Wegtechnisch below a pneumatically controllable color pressure regulator 26 is provided, which is controlled by an electrically operated 3/2-way valve or proportional valve 28 and is used to keep constant a predetermined, matched to the respective related color pressure.
  • the color pressure regulator 26 is further designed such that it can be flowed through in two flow directions.
  • ink is thus conveyed under a predeterminable supply pressure via the supply line 8 to the spray gun 10 and atomized there by means of the compressed air line 16 supplied compressed air through the nozzle 12.
  • the spray gun 10 is mounted in a gun holder 30.
  • the gun holder 30 includes a limit switch 32, which signals to a controller, not shown, the signal "gun in holder". In this position, the spray gun 10 is within the range of action of a trigger cooperating with the controller 34.
  • the controller receives the "gun in holder” signal, the bypass line 24 at the gear pump 22 is closed and the gear pump 22 is driven as the color return device 36 in that it conveys towards the color changer 6. Now 18 compressed air is given to a valve 21 via a directional control valve 38 in the compressed air line.
  • the valve 21 is a diaphragm valve, which, when a pressure is applied via the compressed air line 18, opens against the force of a spring, so that a pressure medium connection to the ink feed line 8 is produced.
  • resilient deformable displacement body 40 acted upon by the compressed air and moves in the ink supply 8 in the return direction, ie in the direction of the color changer 6.
  • the displacer 40 acts to a certain extent as a stamp and presses standing in the Farbzu réelletechnisch 8 color column to the suction side of the gear pump 22.
  • the gear pump 22 then conveys the color against the pending in the circular color lines 2 pressure in the respective color line 2 back.
  • the displacer 40 slides against the inside of the ink supply 8 and cleans them to some extent.
  • the displacement body 40 finally abuts against a stop device 42 in the form of a constriction 44 in the ink feed line 8.
  • a sensor 46 for detecting the displacement body 40 is provided. The sensor 46 operates inductively and reports, when it is passed by the displacement body 40, a corresponding signal to the controller. Then the return operation is terminated. Almost all of the paint that is between the valve 21 and the paint pressure regulator 26 or the stopper 42 for the displacer 40 has been recycled for recycling.
  • FIG. 2 shows the spray gun 10, wherein the feed device 20 is shown cut for the compressed air.
  • the compressed air line 18 opens into a transverse bore 50, which is formed in a metallic block 52 and is connected to a pressure chamber 54 of the valve 20. If that is in FIG. 1 illustrated directional control valve 38 is opened, so is compressed air at about 6 to 8 bar in the pressure chamber 54 at. As a result, a circumferentially clamped membrane 56 is deflected against a spring bias 58. As a result, a valve needle 60 connected to the diaphragm 56 is lifted off its sealing seat 62, so that a flow connection between the pressure chamber 54 and the ink supply line 8 is produced.
  • the sealing seat 62 defines an opening which opens dead space in a mold recess 64 of the ink supply 8. At the same time, as described above, if the valve needle 60 is lifted off the sealing seat 62, the displacement body 40 is pressed out of the mold recess 64 into the ink feed line 8 and travels there as far as the stop device 42, wherein the displacer 40 pushes the color column located in the ink supply line 8 to the suction side of the Zahradpumpe 22 in front of him.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Spray Control Apparatus (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Nozzles (AREA)

Description

Die Erfindung betrifft eine Einrichtung zum Lackieren von Gegenständen mit verschiedenen Farben, die in kreisförmig geführten Farbleitungen, welche je einer Farbe zugeordnet sind, zur Verfügung stehen, mit einer Spritzpistole, einer Farbzuführleitung, die eine Lackiermittelverbindung zwischen der kreisförmig geführten Farbleitung und der Spritzpistole bzw. deren Düse herstellt, und gegebenenfalls einem zwischen den kreisförmig geführten Farbleitungen und der Farbzuführleitung vorgesehenen Farbwechsler, durch den jeweils eine Farbleitung mit der Farbzuführleitung verbindbar ist, wobei ein Verdrängerkörper zum Reinigen der Farbzuführleitung in Lackierflussrichtung der Farbzuführleitung bewegbar ist.The invention relates to a device for painting objects with different colors, which are available in circular color guides, which are each associated with a color, with a spray gun, a Farbzuführleitung which a Lackiermittelverbindung between the circular color guide and the spray gun or whose nozzle produces, and optionally a provided between the circular color ducts and the Farbzuführleitung color changer, through which in each case a color line with the Farbzuführleitung is connectable, wherein a displacement body for cleaning the Farbzuführleitung in Lackierflussrichtung the Farbzuführleitung is movable.

Beim Betreiben von Lackiereinrichtungen besteht seit jeher das Problem, dass einerseits verschiedene Farben zum Einsatz kommen, so dass entweder voneinander getrennte Systeme benutzt werden müssen, was jedoch aufwendig ist und daher üblicherweise nicht praktiziert wird, oder es müssen die Komponenten bei einem Farbwechsel gereinigt werden. Wenn eine Spritzpistole im letzteren Fall zum Spritzen mehrerer Farben verwendet wird, so muss das gerade in der Farbzuführleitung befindliche Farbvolumen entweder verworfen werden oder wie bei der aus der DE 44 23 643 A1 bekannten Lackiereinrichtung wenigstens teilweise in die Farbleitung zurückgeführt werden. Hierfür wird die Farbrückführeinrichtung in Form einer Pumpe verwendet. Das gleiche Problem tritt auf, wenn zwar kein Farbwechsel durchgeführt werden soll, die Lackiereinrichtung oder eine zu einer bestimmten Farbart gehörende Spritzpistole und Farbzuführleitung längere Zeit (bereits 4 - 5 Stunden) nicht benutzt wurden, da hierdurch in der Farbzuführleitung bzw. in der Spritzpistole eine Entmischung bzw. Sedimentation der Farbe stattfindet, so dass dieses Farbvolumen für den Lackiervorgang unbrauchbar ist. In den kreisförmig geführten Farbleitungen finden zwar während eines Stillstands der Anlage ebenfalls Sedimentations- bzw. Entmischungsvorgänge der Farbe statt; die Farbe wird jedoch durch das Zirkulieren beim Betrieb der Lackiereinrichtung wieder homogenisiert. Eine derartige Homogenisierung ist jedoch in der stichleitungsartigen Farbzuführleitung zur Spritzpistole nicht möglich.In the operation of painting equipment has always been the problem that on the one hand different colors are used so that either separate systems must be used, which is complicated and therefore usually not practiced, or it must be cleaned at a color change components. If a spray gun is used in the latter case for spraying several colors, so must be discarded just in the paint supply line color volume or as in the from the DE 44 23 643 A1 known painting at least partially be returned to the paint line. For this purpose, the color return device is used in the form of a pump. The same problem occurs when no color change is to be performed, the paint or a belonging to a particular type of paint spray gun and Farbzuführleitung for a long time (already 4 - 5 hours) were not used, as a result in the paint supply line or in the spray gun Separation or sedimentation of the color takes place, so that this color volume is unusable for the painting process. Although sedimentation or demixing processes of the paint take place in the circular color ducts during a standstill of the plant; However, the color is re-homogenized by the circulation during operation of the painting. However, such homogenization is not possible in the stichleitungsartige Farbzuführleitung to the spray gun.

Eine Lackiereinrichtung mit den Merkmalen des Oberbegriffs des Anspruchs 1 ist aus der US-Patentschrift 5,221,047 bekannt geworden. Der Verdrängerkörper wird zum Ausdrücken der Farbe in der Farbzuführleitung in Lackierflußrichtung zu deren spritzpistolenseitigem Ende bewegt, dort mittels einer Ausschleußeinrichtung aus der Farbzuführleitung entnommen und über eine separate Leitung zu einer Einschleußeinrichtung zurückgeführt. Um diese Zeit zu überbrücken, ist eine Mehrzahl von Verdrängerkörpern vorgesehen. Eine Rückführung von in der Farbzuführleitung befindlicher Farbe zurück in die Farbleitung ist nicht vorgesehen. Dies ist aber für sich genommen, aus der JP 07 171 451 A bekannt.A painting device with the features of the preamble of claim 1 is known from U.S. Patent 5,221,047 known. The displacer is moved for expressing the color in the paint supply in Lackierflußrichtung to their spritzpistolenseitigem end, there removed by means of a reject device from the ink supply and returned via a separate line to a Einschleußeinrichtung. To bridge this time, a plurality of displacers are provided. A return of befindlicher in the ink supply line color back into the color line is not provided. But that is taken for granted, from the JP 07 171 451 A known.

Aus der DE 42 23 054 A1 ist es bereits bekannt, Pulverleitungen mittels Druckluft und mindestens eines elastisch komprimierbaren Reinigungskörpers, der durch die Pulverleitungen hindurchgetrieben wird, zu reinigen.From the DE 42 23 054 A1 It is already known to clean powder lines by means of compressed air and at least one elastically compressible cleaning body, which is driven through the powder lines.

Der vorliegenden Erfindung liegt ausgehend von der vorbekannten Lackiereinrichtungen die Aufgabe zugrunde, die Farbrückführung von der stichleitungsartigen Farbzuführleitung mit Verdrängerkörpern zurück zu einer jeweiligen kreisförmig geführten Farbleitung noch effektiver zu gestalten.The present invention is based on the previously known painting the task of making the color return of the stichleitungsartigen ink supply line with displacers back to a respective circular color guide even more effective.

Diese Aufgabe wird durch eine Lackiereinrichtung mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a painting device with the features of claim 1.

Es wird also erfindungsgemäß vorgeschlagen, die Farbrückführung durch Einleitung eines strömbaren Mediums, bei dem es sich vorzugsweise um ein Gas, wie Druckluft, oder aber auch um ein flüssiges Lösungsmittel handeln kann, zu unterstützen. Das flüssige Medium wirkt dabei wie ein Stempeldruck auf die in der Zuführleitung stehende Farbe und gewährleistet eine dreißig bis fünfzig Prozent effektivere Rückführung der Farbe. Es wurde nämlich festgestellt, dass der allein von der bekannten Farbrückführeinrichtung in Form einer Zahnradpumpe auf die Farbzuführleitung ausgeübte Ansaugdruck mit der Entfernung von der Pumpe stark abnimmt und dass an den Wandungen der Leitung Farbe haften bleibt, die nicht zurückgeführt wird, sondern bei einem anschließenden Spülvorgang zusammen mit dem Spülmedium verworfen wird. Dadurch dass beim Rückführen von Farbe das unter Überdruck stehende strömbare Medium in Rückführrichtung in die Farbzuführleitung eingeleitet wird, konnten Farbrückgewinnungsraten von achtzig Prozent und darüber erreicht werden.It is therefore proposed according to the invention, the color return by introducing a flowable medium, which may be preferably a gas, such as compressed air, or even to be a liquid solvent to support. The liquid medium acts like a stamping pressure on the standing in the feed line color and ensures a thirty to fifty percent more effective return of color. It has been found that the suction pressure exerted solely by the known ink return device in the form of a gear pump on the ink supply line decreases sharply with the distance from the pump and that adhere to the walls of the line color, which is not returned, but in a subsequent rinsing process is discarded together with the flushing medium. As a result of the fact that, when the ink is returned, the flowable medium which is under pressure is introduced into the ink feed line in the return direction, color recovery rates of eighty percent and more could be achieved.

Da die Zuführeinrichtung für das strömbare Medium eine T-Verbindung mit der Farbzuführung bildet, ergibt sich wiederum eine an sich unerwünschte Stichleitung. Es wird daher vorgeschlagen, dass die Zuführeinrichtung ein Ventil umfasst, welches auf seiner Farbseite totraumfrei an die Farbzuführleitung anschließt.Since the feed device for the flowable medium forms a T-connection with the ink feed, this in turn results in an undesirable stub line. It is therefore proposed that the feed device comprises a valve which connects on its color side dead space free to the ink supply.

Zum weiteren Unterstützen der Farbrückführung in der jeweiligen Farbzuführleitung ist der flexible, nachgiebig verformbare Verdrängerkörper vorgesehen, der von dem über die Zuführeinrichtung einströmenden Medium in der Farbzuführleitung in Rückführrichtung bewegbar und beim anschließenden Spülen der Farbzuführleitung wieder in Richtung zur Spritzpistole zurückbewegbar ist. Durch diese weitere erfindungsgemäße Maßnahme kann die Rückgewinnungsrate auf 95 % und mehr gesteigert werden, da durch das Bewegen des nachgiebigen Verdrängerkörpers in Rückführrichtung die Leitungsinnenwandung quasi abgewischt wird. Der Durchmesser des Verdrängerkörpers entspricht im unverformten Zustand im Wesentlichen dem Leitungsinnendurchmesser oder ist etwas größer als dieser. Beim Zurückbewegen des Verdrängerkörpers in Richtung zur Spritzpistole wird dieser Wischvorgang nochmals wiederholt.To further assist the color return in the respective Farbzuführleitung the flexible, flexible deformable displacer is provided, which is movable by the incoming medium via the feed medium in the ink supply line in the return direction and back in the direction of the spray gun during subsequent rinsing the ink supply. As a result of this further measure according to the invention, the recovery rate can be increased to 95% or more, since the conductor inner wall is virtually wiped off by the movement of the yielding displacement body in the return direction. The diameter of the displacer in the undeformed state substantially corresponds to the line internal diameter or is slightly larger than this. When moving back the displacer in the direction of the spray gun this wiping process is repeated again.

Während eines Lackiervorgangs befindet sich der Verdrängerkörper in einer Ruhelage, vorzugsweise in einer Formausnehmung in der Farbzuführleitung im Bereich des totraumfreien Ventilanschlusses der Zuführleitung. Sobald das Ventil der Zuführeinrichtung für das strömbare Medium geöffnet wird, wird der Verdrängerkörper aus der Formausnehmung unter der Wirkung des unter Überdruck stehenden strömbaren Mediums in die lichte Querschnittsfläche der Farbzuführleitung gedrückt und in Rückführrichtung bewegt.During a painting process, the displacer is in a rest position, preferably in a mold cavity in the ink feed line in the region of the dead space-free valve port of the supply line. As soon as the valve of the feed device for the flowable medium is opened, the displacer from the mold cavity is pressed under the action of the pressurized fluid medium in the clear cross-sectional area of the ink supply and moved in the return direction.

Nach einer bevorzugten Ausführungsform ist in Farbrückführrichtung vor der Farbrückführeinrichtung eine Stopeinrichtung für den Verdrängerkörper vorgesehen, welche eine Art Anschlag bzw. Begrenzung für den Verdrängerkörper bildet. Die Stopeinrichtung ist in besonders einfacher und daher vorteilhafter Weise vorzugsweise von einer Querschnittsverengung in der Farbzuführleitung gebildet.According to a preferred embodiment, a stop device for the displacer is provided in the ink return direction in front of the ink return device, which forms a kind stop or limit for the displacer. The stop device is formed in a particularly simple and therefore advantageous manner preferably by a cross-sectional constriction in the Farbzuführleitung.

Nach einem weiteren bevorzugten Erfindungsgedanken ist im Bereich der Stopeinrichtung, insbesondere in Rückführrichtung vor der Stopeinrichtung ein Sensor zum Erkennen des Verdrängerkörpers vorgesehen. Dieser Sensor wirkt mit einer Steuerung der Lackieranlage zusammen. Wenn der Sensor erkennt, dass der Verdrängerkörper in seiner Endlage im Bereich der Stopeinrichtung angelangt ist, so ist der Rückführvorgang beendet und ein Spülvorgang der Farbzuführleitung kann eingeleitet werden.According to a further preferred idea of the invention, a sensor for detecting the displacer is provided in the region of the stop device, in particular in the return direction in front of the stop device. This sensor interacts with a control of the paint shop. When the sensor detects that the displacer has reached its end position in the region of the stop device, the return operation is completed and a flushing operation of the ink supply line can be initiated.

Das Erkennen des Verdrängerkörpers ist vorzugsweise berührungslos durchführbar, was durch einen induktiv oder kapazitiv arbeitenden Sensor erreicht werden kann. Im ersten Fall umfasst der Verdrängerkörper einen induktiv detektierbaren Signalkörper, wie z.B. einen metallischen, insbesondere kugelförmigen Kern.The detection of the displacer is preferably carried out without contact, which can be achieved by an inductively or capacitively operating sensor. In the first case, the displacement body comprises an inductively detectable signal body, such as e.g. a metallic, in particular spherical core.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus den beigefügten Ansprüchen und der zeichnerischen Darstellung und nachfolgenden Beschreibung einer bevorzugten Ausführungsform der erfindungsgemäßen Lackiereinrichtung. In der Zeichnung zeigt:

Figur 1
eine schematische Darstellung einer erfindungsgemäßen Lackiereinrichtung mit einem Farbversorgungsraum kommunizierenden Farbleitungen;
Figur 2
eine teilweise im Schnitt dargestellte Spritzpistole der erfindungsgemäßen Lackiereinrichtung.
Further features, details and advantages of the invention will become apparent from the appended claims and the drawings and the following description of a preferred embodiment of the painting device according to the invention. In the drawing shows:
FIG. 1
a schematic representation of a coating device according to the invention with a Farbversorgungsraum communicating color lines;
FIG. 2
a partially shown in section spray gun of the painting device according to the invention.

Figur 1 zeigt in schematischer Darstellung eine Einrichtung zum Lackieren von Gegenständen mit verschiedenen Farben. Die Farben werden über kreisförmig geführte Farbleitungen 2, die von einem lediglich angedeuteten Farbversorgungsraum 4 ausgehen und wieder zu diesem zurückführen, zu der Lackiereinrichtung herangeführt. Die Lackiereinrichtung umfasst einen Farbwechsler 6, der mit jeder der Farbleitungen 2 wahlweise verbindbar ist. Vom Farbwechsler 6 ausgehend ist eine Farbzuführleitung 8 vorgesehen, welche eine Lackiermittelverbindung zwischen dem Farbwechsler 6 und einer Sprühpistole 10 bzw. einer Düse 12 der Sprühpistole 10 herstellt. Desweiteren sind verschiedene Druckluftzuführungen vorgesehen, wobei eine Druckluftleitung 14 in den Farbwechsler 6 mündet und eine weitere Druckluftleitung 16 zur Spritzpistole 10 führt und die sogenannte Spritzluft zum Verdüsen oder Verstäuben der Farbe im Sprühbetrieb der Spritzpistole 10 zuführt. FIG. 1 shows a schematic representation of a device for painting objects with different colors. The colors are introduced via circularly guided color lines 2, which emanate from a merely indicated ink supply space 4 and return to this, brought to the painting. The painting device comprises a color changer 6, which is selectively connectable to each of the color lines 2. Starting from the color changer 6, a Farbzuführleitung 8 is provided which produces a Lackiermittelverbindung between the color changer 6 and a spray gun 10 and a nozzle 12 of the spray gun 10. Furthermore, various compressed air supply lines are provided, wherein a compressed air line 14 opens into the color changer 6 and another compressed air line 16 leads to the spray gun 10 and the so-called spray air for atomizing or dusting the paint in the spray operation of the spray gun 10 supplies.

Desweiteren erstreckt sich eine Druckluftleitung 18 als Teil einer Zuführeinrichtung 20 für ein unter Überdruck stehendes strömbares Medium (Druckluft) zu der Farbzuführleitung 8 und mündet über ein Ventil 21 in der Farbzuführleitung 8.Furthermore, a compressed air line 18 extends as part of a feed device 20 for a flowable medium under pressure (compressed air) to the ink supply line 8 and flows through a valve 21 in the ink feed 8.

Im Lackierbetrieb ist eines der Absperrventile zwischen einer jeweiligen Farbleitung 2 und dem Farbwechsler 6 geöffnet, so dass der in der kreisförmig geführten Farbleitung herrschende Druck sich über den Farbwechsler 6 in die Zuführleitung 8 ausbreitet. Da dieser Druck zum Betreiben der Spritzpistole hinreichend ist, braucht keine weitere Pumpe eingesetzt zu werden und eine in der Farbzuführleitung vorgesehene Zahnradpumpe 22 wird über eine Bypassleitung 24 umgangen. In der Farbzuführleitung 8 ist der Zahnradpumpe 22 in Lackierflussrichtung nachfolgend ein pneumatisch ansteuerbarer Farbdruckregler 26 vorgesehen, der über ein elektrisch betätigtes 3/2-Wegeventil oder Proportionalventil 28 angesteuert wird und zum Konstanthalten eines vorgebbaren, auf die jeweils verwandte Farbe abgestimmten Drucks dient. Der Farbdruckregler 26 ist ferner so ausgebildet, dass er in zwei Durchflussrichtungen durchströmbar ist.In the painting operation, one of the shut-off valves between a respective color line 2 and the color changer 6 is opened, so that the pressure prevailing in the circular color guide line propagates through the color changer 6 in the feed line 8. Since this pressure is sufficient for operating the spray gun, no further pump needs to be used and a provided in the ink supply line gear pump 22 is bypassed via a bypass line 24. In the paint supply 8, the gear pump 22 in Lackierflussrichtung below a pneumatically controllable color pressure regulator 26 is provided, which is controlled by an electrically operated 3/2-way valve or proportional valve 28 and is used to keep constant a predetermined, matched to the respective related color pressure. The color pressure regulator 26 is further designed such that it can be flowed through in two flow directions.

Im Lackierbetrieb wird also Farbe unter einem vorgebbaren Zuführdruck über die Zuführleitung 8 zur Spritzpistole 10 gefördert und dort mittels über die Druckluftleitung 16 herangeführter Pressluft durch die Düse 12 zerstäubt.In painting operation, ink is thus conveyed under a predeterminable supply pressure via the supply line 8 to the spray gun 10 and atomized there by means of the compressed air line 16 supplied compressed air through the nozzle 12.

Wenn ein Farbwechsel durchgeführt werden soll oder der Lackiervorgang längere Zeit unterbrochen werden soll, wird die Spritzpistole 10 in eine Pistolenhalterung 30 eingehängt. Die Pistolenhalterung 30 umfasst einen Endschalter 32, welcher an eine nicht dargestellte Steuerung das Signal "Pistole in Halterung" meldet. In dieser Position ist die Spritzpistole 10 im Wirkungsbereich einer mit der Steuerung zusammenwirkenden Abzugsvorrichtung 34. Wenn die Steuerung das Signal "Pistole in Halterung" erhält, so wird die Bypassleitung 24 bei der Zahnradpumpe 22 geschlossen, und die Zahnradpumpe 22 wird als Farbrückführeinrichtung 36 so angetrieben, dass sie in Richtung auf den Farbwechsler 6 fördert. Nun wird über ein Wegeventil 38 in der Druckluftleitung 18 Druckluft auf ein Ventil 21 gegeben. Bei dem Ventil 21 handelt es sich um ein Membranventil, das bei Anliegen eines Drucks über die Druckluftleitung 18 entgegen der Kraft einer Feder öffnet, so dass eine Druckmittelverbindung zur Farbzuführleitung 8 hergestellt wird. Hierbei wird ein aus der Figur 2 ersichtlicher, nachgiebig verformbarer Verdrängerkörper 40 von der Druckluft beaufschlagt und in der Farbzuführleitung 8 in Rückführrichtung, d.h. in Richtung auf den Farbwechsler 6 bewegt. Der Verdrängerkörper 40 wirkt dabei gewissermaßen als Stempel und drückt die in der Farbzuführleitung 8 stehende Farbsäule zur Ansaugseite der Zahnradpumpe 22. Die Zahnradpumpe 22 fördert die Farbe dann entgegen dem in den kreisförmigen Farbleitungen 2 anstehenden Druck in die jeweilige Farbleitung 2 zurück. Dabei gleitet der Verdrängerkörper 40 gegen die Innenseite der Farbzuführleitung 8 und putzt diese gewissermaßen aus. Der Verdrängerkörper 40 schlägt schließlich gegen eine Stopeinrichtung 42 in Form einer Verengung 44 in der Farbzuführleitung 8 an. Unmittelbar vor der Verengung 44 ist ein Sensor 46 zum Erkennen des Verdrängerkörpers 40 vorgesehen. Der Sensor 46 arbeitet induktiv und meldet, wenn er vom Verdrángerkörper 40 passiert wird, ein dementsprechendes Signal an die Steuerung. Daraufhin wird der Rückführvorgang beendet. Nahezu die gesamte Farbe, die sich zwischen dem Ventil 21 und dem Farbdruckregler 26 bzw. der Stopeinrichtung 42 für den Verdrängerkörper 40 befindet, wurde zur Wiederverwertung zurückgeführt. Es wird nun durch abwechselndes Öffnen eines Ventils in einer noch nicht erwähnten Lösungsmittelleitung 48 und in der eingangs erwähnten Druckluftleitung 14 ein Spülvorgang eingeleitet. Das Gemisch aus Druckluft und Lösungsmittel wird in den Farbwechsler 6 eingeleitet und passiert in Lackierflussrichtung die Zahnradpumpe 22 über die Bypassleitung 24 und gelangt über den Farbdruckregler 26 zu der Stopeinrichtung 42 und beaufschlagt und befördert den Verdrängerkörper 40 wieder zurück in Richtung auf die Spritzpistole 10. Beim Einleiten dieses Spülvorgangs wird über die zuvor erwähnte Abzugsvorrichtung 34 der Abzug der Spritzpistole 10 betätigt, so dass das Lösungsmittel/Luftgemisch über die Düse 12 in die Pistolenhalterung 30 gelangen und von dort einer gesonderten Entsorgung zugeführt werden kann. Nachdem der Verdrängerkörper 40 wieder die in Figur 2 dargestellte Lage eingenommen hat, ist der Spülvorgang beendet und es kann durch Öffnen eines anderen Absperrventils eine andere Farbleitung 2 mit dem Farbwechsler 6 bzw. der Farbzuführleitung 8 verbunden werden.If a color change is to be performed or the painting process is to be interrupted for a long time, the spray gun 10 is mounted in a gun holder 30. The gun holder 30 includes a limit switch 32, which signals to a controller, not shown, the signal "gun in holder". In this position, the spray gun 10 is within the range of action of a trigger cooperating with the controller 34. When the controller receives the "gun in holder" signal, the bypass line 24 at the gear pump 22 is closed and the gear pump 22 is driven as the color return device 36 in that it conveys towards the color changer 6. Now 18 compressed air is given to a valve 21 via a directional control valve 38 in the compressed air line. The valve 21 is a diaphragm valve, which, when a pressure is applied via the compressed air line 18, opens against the force of a spring, so that a pressure medium connection to the ink feed line 8 is produced. Here is a from the FIG. 2 apparent, resilient deformable displacement body 40 acted upon by the compressed air and moves in the ink supply 8 in the return direction, ie in the direction of the color changer 6. The displacer 40 acts to a certain extent as a stamp and presses standing in the Farbzuführleitung 8 color column to the suction side of the gear pump 22. The gear pump 22 then conveys the color against the pending in the circular color lines 2 pressure in the respective color line 2 back. In this case, the displacer 40 slides against the inside of the ink supply 8 and cleans them to some extent. The displacement body 40 finally abuts against a stop device 42 in the form of a constriction 44 in the ink feed line 8. Immediately before the constriction 44, a sensor 46 for detecting the displacement body 40 is provided. The sensor 46 operates inductively and reports, when it is passed by the displacement body 40, a corresponding signal to the controller. Then the return operation is terminated. Almost all of the paint that is between the valve 21 and the paint pressure regulator 26 or the stopper 42 for the displacer 40 has been recycled for recycling. It is now initiated by alternately opening a valve in a not yet mentioned solvent line 48 and in the aforementioned compressed air line 14, a rinsing process. The mixture of compressed air and solvent is introduced into the color changer 6 and passes in Lackierflussrichtung the gear pump 22 via the bypass line 24 and passes through the color pressure regulator 26 to the stop means 42 and acted upon and conveys the displacer 40 back toward the spray gun 10. Beim Initiation of this rinse operation is actuated via the abovementioned extraction device 34 of the trigger of the spray gun 10, so that the solvent / air mixture pass through the nozzle 12 into the gun holder 30 and can be supplied from there to a separate disposal. After the displacer 40 again in FIG. 2 has assumed position, the flushing process is completed and it can be connected by opening another shut-off valve another color line 2 with the color changer 6 and the Farbzuführleitung 8.

Figur 2 zeigt die Spritzpistole 10, wobei die Zuführeinrichtung 20 für die Druckluft geschnitten dargestellt ist. Die Druckluftleitung 18 mündet in eine Querbohrung 50, die in einem metallischen Block 52 ausgebildet ist und mit einem Druckraum 54 des Ventils 20 verbunden ist. Wenn das in Figur 1 dargestellte Wegeventil 38 geöffnet wird, so steht Druckluft unter ca. 6 bis 8 bar im Druckraum 54 an. Hierdurch wird eine umfangsseitig eingespannte Membran 56 entgegen einer Federvorspannung 58 ausgelenkt. Hierdurch wird eine mit der Membran 56 verbundene Ventilnadel 60 von ihrem Dichtsitz 62 abgehoben, so dass eine Strömungsverbindung zwischen dem Druckraum 54 und der Farbzuführleitung 8 hergestellt wird. Der Dichtsitz 62 begrenzt eine Öffnung, die totraumfrei in einer Formausnehmung 64 der Farbzuführleitung 8 mündet. Diese Formausnehmung 64 bildet zugleich eine Ruheposition für den Verdrängerkörper 40. Wenn also - wie soeben beschrieben - die Ventilnadel 60 vom Dichtsitz 62 abgehoben wird, so wird der Verdrängerkörper 40 aus der Formausnehmung 64 heraus in die Farbzuführleitung 8 gedrückt und wandert darin bis zu der Stopeinrichtung 42, wobei der Verdrängerkörper 40 die in der Farbzuführleitung 8 befindliche Farbsäule zur Ansaugseite der Zahradpumpe 22 vor sich herschiebt. FIG. 2 shows the spray gun 10, wherein the feed device 20 is shown cut for the compressed air. The compressed air line 18 opens into a transverse bore 50, which is formed in a metallic block 52 and is connected to a pressure chamber 54 of the valve 20. If that is in FIG. 1 illustrated directional control valve 38 is opened, so is compressed air at about 6 to 8 bar in the pressure chamber 54 at. As a result, a circumferentially clamped membrane 56 is deflected against a spring bias 58. As a result, a valve needle 60 connected to the diaphragm 56 is lifted off its sealing seat 62, so that a flow connection between the pressure chamber 54 and the ink supply line 8 is produced. The sealing seat 62 defines an opening which opens dead space in a mold recess 64 of the ink supply 8. At the same time, as described above, if the valve needle 60 is lifted off the sealing seat 62, the displacement body 40 is pressed out of the mold recess 64 into the ink feed line 8 and travels there as far as the stop device 42, wherein the displacer 40 pushes the color column located in the ink supply line 8 to the suction side of the Zahradpumpe 22 in front of him.

Beim Spülen der Zuführleitung 8 ist das Wegeventil 38 und damit das Ventil 21 geschlossen. Das Spülgemisch strömt dann an dem wieder in die Formausnehmung 64 gedrückten Verdrängerkörper 40 vorbei und entweicht durch die Düse 12 der Spritzpistole 10 in die Pistolenhalterung 30.When flushing the supply line 8, the directional control valve 38 and thus the valve 21 is closed. The rinsing mixture then flows past the displacer 40, which is again pressed into the mold cavity 64, and escapes through the nozzle 12 of the spray gun 10 into the gun holder 30.

Claims (8)

  1. Arrangement for painting objects with different coloured paints, which are available in circularly run coloured-paint lines (2), each of which is allocated one colour, comprising a spray gun (10), a coloured-paint feed line (8), which creates a paint-means connection between a circularly run coloured-paint line (2) and the spray gun (10), wherein a displacement body (40) for cleaning the coloured-paint feed line (8) is provided, the displacement body (40) being movable in the paint-flow direction in the coloured-paint feed line, characterized in that, in the region of the spraygun end of the coloured-paint feed line (8), there is provided a feed means (20) for feeding a medium into the coloured-paint feed line (8), the medium being under pressure and able to flow, and in that the feed means (20) includes a valve (21), which connects up on the coloured-paint side to the coloured-paint feed line (8) such to involve substantially no dead space, and in that the coloured paint present in the coloured-paint feed line (8) can be fed back against the paint flow direction and in that, to assist the feedback of coloured paint in the coloured-paint feed line (8), the said flexible, resiliently deformable displacement body (40) can be moved by the medium in the coloured-paint feed line (8) against the paint-flow direction in the feedback direction, the medium being able to flow in by way of the feed means (20), and can be moved back again, during the subsequent flushing of the coloured-paint feed line (8), toward the spray gun (10) and is received, during painting, in a moulded recess (64) in the coloured-paint feed line (8).
  2. Arrangement according to claim 1, characterized in that the displacement body (40) is provided, during painting, in a moulded recess (64) in the coloured-paint feed line (8) in the region of the zero dead-space valve connection of the feed line
  3. Arrangement according to any one of the preceding claims, characterized in that, in front of the coloured-paint feedback means (22, 36) in the feedback direction, there is provided a stop means (42) for the displacement body (40).
  4. Arrangement according to claim 3, characterized in that the stop means (42) is constituted by a transverse-section constriction (44) in the coloured-paint feed line (8).
  5. Arrangement according to claim 3 or claim 4, characterized in that, in the region of the stop means (42) or in front of the stop means (42) in the feedback direction, there is provided a sensor (46) for detecting the displacement body.
  6. Arrangement according to claim 5, characterized in that the displacement body (40) can be detected in a contactless manner.
  7. Arrangement according to claim 6, characterized in that the sensor (46) works inductively or capacitively.
  8. Arrangement according to any one of the preceding claims, characterized in that the displacement body (40) comprises an inductively detectable signal body.
EP98104412A 1997-03-11 1998-03-11 Colour changer with reversible direction of paint flow Expired - Lifetime EP0865830B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19709988 1997-03-11
DE19709988A DE19709988C2 (en) 1997-03-11 1997-03-11 Painting device with several circular color lines

Publications (4)

Publication Number Publication Date
EP0865830A2 EP0865830A2 (en) 1998-09-23
EP0865830A3 EP0865830A3 (en) 2002-01-30
EP0865830B1 EP0865830B1 (en) 2005-06-08
EP0865830B2 true EP0865830B2 (en) 2009-09-16

Family

ID=7822967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98104412A Expired - Lifetime EP0865830B2 (en) 1997-03-11 1998-03-11 Colour changer with reversible direction of paint flow

Country Status (3)

Country Link
EP (1) EP0865830B2 (en)
DE (2) DE19709988C2 (en)
ES (1) ES2242988T5 (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19817377B4 (en) * 1998-04-18 2013-01-03 Lactec Gmbh Method and apparatus for supplying paint to at least two atomizers
EP0888825B1 (en) * 1997-07-03 2003-08-20 Lactec Gesellschaft für moderne Lackiertechnik mbH Device for painting
DE19742588B4 (en) 1997-09-26 2009-02-19 Dürr Systems GmbH Method for serial coating of workpieces
DE19805938A1 (en) * 1998-02-13 1999-08-19 Lactec Gmbh Method and device for coating parts
FR2808709B1 (en) 2000-05-15 2002-07-19 Eisenmann France Sarl METHOD FOR RECOVERING A COATING FLUID, SUCH AS A PAINT, CONTAINED IN A PLANT
DE10033986A1 (en) 2000-07-13 2002-01-24 Duerr Systems Gmbh Process for using a pig in a coating installation and pig therefor
DE10115472A1 (en) 2001-03-29 2002-10-10 Duerr Systems Gmbh Valve unit for use in electrostatic painting apparatus has an optoelectronic sensor device with light wave conductors and an optoelectronic sensor to sense an indexing position and to generate a corresponding sensing signal.
DE10115467A1 (en) 2001-03-29 2002-10-02 Duerr Systems Gmbh Tool changing system for one machine
DE10115470A1 (en) 2001-03-29 2002-10-10 Duerr Systems Gmbh Coating system with an atomizer change station
DE10115463A1 (en) 2001-03-29 2002-10-02 Duerr Systems Gmbh Atomizer for a coating system and process for its material supply
DE10202711A1 (en) 2002-01-24 2003-07-31 Duerr Systems Gmbh Sprayer unit for electrostatic serial coating of workpieces comprises an electrode array integrated into the ring section of insulating material on the outer housing of the unit
DE10211244A1 (en) * 2002-03-13 2003-10-23 Lactec Ges Fuer Moderne Lackte Painting system for applying liquid coating material
DE10231421A1 (en) 2002-07-11 2004-01-22 Dürr Systems GmbH Method and system for supplying a powder coating device
DE10233198A1 (en) 2002-07-22 2004-02-05 Dürr Systems GmbH rotary atomizers
DE10239516A1 (en) * 2002-08-28 2004-03-18 Dürr Systems GmbH Hose with pig for delivery of electrically conductive fluid paints or varnishes at high voltage comprises an inner layer enclosed in an insulating layer with high voltage resistance
DE10239517A1 (en) 2002-08-28 2004-03-11 Dürr Systems GmbH Coating device with a rotary atomizer and method for controlling its operation
DE10240451A1 (en) 2002-09-02 2004-03-11 Dürr Systems GmbH Sensor arrangement for a coating system
DE10245594A1 (en) 2002-09-30 2004-04-08 Dürr Systems GmbH Collision detection method
US6991178B2 (en) 2003-01-24 2006-01-31 Dürr Systems, Inc. Concentric paint atomizer shaping air rings
DE102004015417A1 (en) * 2004-03-26 2005-10-13 Putzmeister Ag Apparatus and method for cleaning a thick matter delivery line
DE102004038017B4 (en) * 2004-08-04 2012-07-12 Wolfgang Schmidt Process and installation for sequential discharge of different coating materials
DE102004042512A1 (en) * 2004-09-02 2006-03-30 Hydac Accessories Gmbh valve device
US8671495B2 (en) 2006-11-06 2014-03-18 Durr Systems, Inc. Scraper pig
DE102008047118B4 (en) * 2008-09-15 2024-02-01 Dürr Systems Ag Painting system component

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2258174A (en) † 1940-01-22 1941-10-07 Chawner William Rupert Apparatus for cleaning conduits
DE9110650U1 (en) † 1990-09-25 1991-10-24 Streit AG Lack- und Farbenfabrik, Frauenfeld Self-cleaning spray device in a paint spray booth for painting objects; as well as a suitable spray gun
DE4035435C1 (en) † 1990-11-08 1992-03-19 Bayer Ag, 5090 Leverkusen, De Transfer station of pipeline - incorporates by=pass and pig trap system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4373225A (en) * 1979-07-06 1983-02-15 Friedrich Wilh. Schwing, Gmbh Piping valve with a housing for the transfer of a wiper insertable in conduits that supply pressurized viscous material, preferably concrete
DE8911560U1 (en) * 1989-09-28 1990-01-25 Upmann, Herko, Dipl.-Ing. Spray gun
US5221047A (en) * 1991-08-13 1993-06-22 Gmfanuc Robotics Corporation Method and system for cleaning a paint supply line and changing paint colors in production paint operations
DE4223054A1 (en) * 1992-07-14 1994-01-20 Gema Volstatic Ag St Gallen Cleaning method for hoses, injectors etc. of powder coating equipment - involves driving one or more oversize sponge plugs through hose with axially aligned compressed air jet whose dia. is less than that of hose
DE4423643A1 (en) * 1994-07-06 1996-01-11 Ind Lackieranlagen Schmidt Gmb Spray coating device for different paint colours

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2258174A (en) † 1940-01-22 1941-10-07 Chawner William Rupert Apparatus for cleaning conduits
DE9110650U1 (en) † 1990-09-25 1991-10-24 Streit AG Lack- und Farbenfabrik, Frauenfeld Self-cleaning spray device in a paint spray booth for painting objects; as well as a suitable spray gun
DE4035435C1 (en) † 1990-11-08 1992-03-19 Bayer Ag, 5090 Leverkusen, De Transfer station of pipeline - incorporates by=pass and pig trap system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ING. H.-D. KLUDUS: "Möglichkeiten und Grenzen der Molchtechnik", CHEMIE-TECHNIK, May 1995 (1995-05-01), HEIDELBERG †

Also Published As

Publication number Publication date
ES2242988T3 (en) 2005-11-16
ES2242988T5 (en) 2009-12-14
EP0865830A3 (en) 2002-01-30
DE59812844D1 (en) 2005-07-14
DE19709988C2 (en) 2002-01-24
EP0865830B1 (en) 2005-06-08
DE19709988A1 (en) 1998-10-01
EP0865830A2 (en) 1998-09-23

Similar Documents

Publication Publication Date Title
EP0865830B2 (en) Colour changer with reversible direction of paint flow
DE10140216B4 (en) Method and device on a painting device for cleaning a paint delivery line
DE19742588B4 (en) Method for serial coating of workpieces
DE19728155A1 (en) Cleaning and preparation method for paint spray pipe
DE2742791A1 (en) Pistol head for blending and spraying polyurethane foams - with non-return valves and detachable nozzles to eliminate fouling
DE10033987A1 (en) Process for supplying a coating member for the electrostatic series coating of workpieces and supply system therefor
EP1314483B1 (en) Method and system for metered delivery of coating material to a coating apparatus
DE19610588A1 (en) Coating machine with interchangeable container
EP0361303A1 (en) Injection-moulding machine
EP2929944A1 (en) Dye spraying device
DE19536623C1 (en) Device for metering out thick substances
EP0888825B1 (en) Device for painting
EP1270083B1 (en) System and method for supplying a coating device via pigs
EP2183056A1 (en) Device for applying liquid coating materials
EP2056970B2 (en) Cleaning apparatus for sprayers, in particular spray guns, and method for cleaning a sprayer
EP0541745B1 (en) Spray coating device
EP0466943A1 (en) Liquid pulverizer
EP1516676B1 (en) Method for operating a media supply device
EP1314480B1 (en) Method and device for paint supply in a coating device using a pig
CH633460A5 (en) Arrangement in a spray gun for cleaning thereof
DE20021641U1 (en) Cleaning device for vehicles, preferably motor vehicles
DE4413249A1 (en) Process to spray mixed colours on substrate
EP1632700A1 (en) Valve device
DE3201639C2 (en) Inking unit for low-viscosity ink, especially a flexographic printing machine
DE9106610U1 (en) Spray coating device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

Kind code of ref document: A2

Designated state(s): BE DE ES FR GB IT NL

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RIC1 Information provided on ipc code assigned before grant

Free format text: 7B 05B 12/14 A, 7B 05B 15/02 B

17P Request for examination filed

Effective date: 20020709

AKX Designation fees paid

Free format text: BE DE ES FR GB IT NL

17Q First examination report despatched

Effective date: 20031006

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: DUERR SYSTEMS GMBH

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE ES FR GB IT NL

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20050608

REF Corresponds to:

Ref document number: 59812844

Country of ref document: DE

Date of ref document: 20050714

Kind code of ref document: P

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2242988

Country of ref document: ES

Kind code of ref document: T3

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

ET Fr: translation filed
26 Opposition filed

Opponent name: LACTEC GMBH GESELLSCHAFT FUER MODERNE LACKIERTECHN

Effective date: 20060308

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

NLR1 Nl: opposition has been filed with the epo

Opponent name: LACTEC GMBH GESELLSCHAFT FUER MODERNE LACKIERTECHN

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

PLBP Opposition withdrawn

Free format text: ORIGINAL CODE: 0009264

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 20090916

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): BE DE ES FR GB IT NL

NLR2 Nl: decision of opposition

Effective date: 20090916

NLR3 Nl: receipt of modified translations in the netherlands language after an opposition procedure
REG Reference to a national code

Ref country code: ES

Ref legal event code: DC2A

Date of ref document: 20091023

Kind code of ref document: T5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111001

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 19

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20170323

Year of fee payment: 20

Ref country code: NL

Payment date: 20170323

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20170323

Year of fee payment: 20

Ref country code: BE

Payment date: 20170323

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20170519

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20170323

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20170323

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59812844

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MK

Effective date: 20180310

REG Reference to a national code

Ref country code: BE

Ref legal event code: MK

Effective date: 20180311

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20180310

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20180310

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20220110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20180312